Hi Lukitoh,
I'm no expert myself, but have experimented with playing a string solo with the right hand while very gently but quickly rocking a pitch bend wheel to create a pseudo-vibrato, with some success.
If you have a synth (soft or hard) with portimenti controls, you can set this to a value greater than zero so that one note "slurs" or glides into the next. And if you have a mod wheel, you can change the attack velocity, again with the left hand, while you play a string melody with the right.
Also, I've heard of people setting their pitch blend to a full 12 tone range to play electric guitar-type stuff, but I've tried it and haven't been able to make it work very well. Maybe you could.
There are others who know far more about this than me, but I hope this helps.
Quasar
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Quasar